Supercomputers/Systems/IREN Childress Horizons 1-4 (Microsoft)
USA · operational · ai training
IREN Childress Horizons 1-4 (Microsoft)
Operated by IREN at IREN Childress Campus .
Phase 1 seed dataset, compiled by hand. These rows were built from public operator, laboratory and vendor sources. A mechanical second-reader pass has since fetched every cited source: 1092 of 1153 systems have a readable citation that names them, and 40 are genuinely weakly sourced. Every claim carries its source and a confidence tier. Treat anything below verified as a lead, not a citation.
Measured performance
- Rmax
- -
- Rpeak
- -
- Rmax ÷ Rpeak
- -
- Cores
- -
- Power
- -
- Per watt
- - GF/W
Figures are as last publicly reported for the configuration described below, not a live measurement. Where a system was upgraded in place, the post-upgrade configuration is shown and the earlier one appears in the timeline.
What this machine is made of
One row per supplier relationship. “Supplier at build” is the company that shipped the part at the time; where that company has since been acquired, the parent it rolls up to today is shown beside it. That distinction is what makes ticker-level aggregation possible across a thirty-year dataset.
| Role | Part | Supplier at build | Quantity | Confidence | Source |
|---|---|---|---|---|---|
| Integrator | - Dell Technologies supplies GPUs and servers (about 5.8 billion dollar purchase agreement, tranches from March 2026) | Dell Technologies | - | Verified | techinformed.comsec.gov |
| Accelerator | NVIDIA GB300 NVL72 Accelerators NVIDIA GB300 NVL72 systems across four 50 MW Horizon deployments for Microsoft; no unit count stated | NVIDIA | - | Verified | irisenergy.gcs-web.comtechinformed.com |
| Cooling | Direct-to-chip cold plate Cooling Cold plate on the package, air for the remainder · Removes roughly 50-80 percent of node heat to liquid Direct-to-chip liquid cooled data centers, 50 MW IT load per Horizon | IREN | - | Reported | irisenergy.gcs-web.com |
AI datacenter metrics
Figures beyond an accelerator count, each with who stated it. What can and cannot be compared across AI datacenters.
| Metric | Value | As of | Basis | Note | Source |
|---|---|---|---|---|---|
| Facility power | 750 MW | 2026-06-30 | Design target | IREN FY2026 10-K lists Childress, Texas at 750 MW total planned gross power capacity. Whole campus, not only the 200 MW Horizons 1 to 4. | sec.gov |
| IT power | 200 MW | 2026-08-13 | Design target | IREN: Horizons 1 to 4 are four 50 MW IT-load direct-to-chip liquid cooled deployments for Microsoft (200 MW total); Horizon 1 delivered Aug 2026. | sec.gov |
How it is powered
| Source | Provider | MW | Status | As of | Basis | Note | Source link |
|---|---|---|---|---|---|---|---|
| Grid | - | 750 | contracted | 2026-06 | Operator stated | 10-K: Childress, Texas 750 MW planned gross capacity on ERCOT with market-priced power and RECs; 10-K cites executed grid connection agreements, about 5 GW across sites. | sec.goviren.com |
How AI campuses are powered: capacities are what the operator, utility or filing states, not what has been delivered.
Compute deals
All compute deals. Headline values are as announced, not additive.
The read
IREN's liquid-cooled NVIDIA GB300 NVL72 AI cloud at its Childress, Texas campus, built for Microsoft under a five-year, 9.7 billion dollar cloud services contract announced 3 November 2025. The deployment is four 50 MW IT-load phases (Horizons 1 to 4, about 200 MW in all) on a 750 MW campus, with GPUs and servers bought from Dell Technologies in a roughly 5.8 billion dollar purchase agreement whose scope includes InfiniBand networking. IREN announced on 13 August 2026 that Horizon 1 had been delivered to and accepted by Microsoft; Horizons 2 to 4 are due later in 2026, so status is operational for the first phase only and the row will need updating as the remaining phases land. Neither source states a GPU or rack count, so no accelerator quantity is recorded, and 200 MW is a contracted design load so power is blank. It has never submitted an HPL result.
Site & facility
IREN Childress Campus
- Location
- Childress, TX, USA
- Utility
- ERCOT (on-site substations)
- Cooling
- Direct-to-chip liquid cooling
- Commissioned
- 2026
Change history
- 2026-10-01 Added IREN Childress Horizons 1-4 (Microsoft) (IREN)
Source check
We fetched this system's own citations and recorded whether each page actually mentions it. This is a corroboration signal, not a fact check, and it is published so you can see how well the sourcing holds up rather than take it on trust.
| Cited source | Result | Found on the page |
|---|---|---|
| irisenergy.gcs-web.com | names system and part | NVIDIA GB300 NVL72, Direct-to-chip cold plate |
| techinformed.com | names system and part | NVIDIA GB300 NVL72 |
Checked 2026-10-09 by pnpm verify. Re-run it and the table changes with the web.
Further reading
Inside a node
Why accelerators exist, what the memory hierarchy costs, and how the CPU and accelerator merged onto one package.
Operating a supercomputer
Acceptance testing, why "installed" and "in production" are six months apart, and the machine lifecycle.
Power and cooling
Why air ran out at 20 kW a rack, how warm-water cooling removes the chillers, and what PUE conceals.